Of an emotion: vehement, strong; easily roused; ardent.

Of a strong, severe, or violent character in respect of operation or effect. Of feelings.

Of a thought, emotion, etc.: extremely strong, intense, or deep; fervent, ardent, passionate.

Esp. of a person's mental or emotional state: fervent, inflamed; stimulated; animated. Cf. fire, v.1 2 and fired-up adj. at compounds.

Of an emotion: vehement, heartfelt.

Full of life; vigorous, active, or energetic on this account; lively or brisk. Of feelings, etc.: Lively, strong, intense.